By Whitney Pastorek
Updated July 15, 2009 at 12:00 PM EDT

According to the Hollywood Reporter, Willem Dafoe has been cast as Tars Tarkas in the Andrew Stanton-directed John Carter of Mars, an adaptation of the Edgar Rice Burroughs book series. Lynn Collins and Taylor Kitsch have already been signed for the story of a Civil War soldier who gets transported to Mars, which is slated to begin shooting in 2010.